Superphosphate-chamber and means for emptying same.



J. F. 0. M. T116133. SUPEEPHOSPHATE CHAMBER AND MEANS FOR BMPTYING SAME. APPLICATION FILED 4116.11, 1910.

8 SHEETS-SHEET 1 Patented Jan. 2, 1912.

J. P. 0. M. TRO'Bs. SUPERPHOSPHATE CHAMBER AND MEANS FOR EMPTYING SAME. APPLIOATION FILED AUG.11, 1910.

v Y Patented Jan. 2, 1912;

' 3 SHEETS-:SHEET 2.

J. F. O. M. TROBS; SUPERPHOSPHATE GHAMBE E AND MEANS FOR EMPTYING SAME. APPLICATION IIL ED AUG. 11, 1910.

Patented J an. 2, 1912.

3 SHEETS-SHEET 3 tents of JOHANN FRIEDRICH CARL MARTI N T363 s, or HARBURG-ON-THE-ELBE, GERMANY,

ASSIGNOR TO HEINRICH FREUDENTHAL, OF HAMBURG, GERMANY.

SUPERPHOSPHATE-CHAMBER AND MEANS FOR EMPTYING- Specification of Letters Patent.

Patented Jan. 2, 1912.

Application filed August 11, 1910. Serial No. 576,752.

'ghate-Chambers and Means for Emptying ame, of which the following is a specification.

In superphosphate chambers as constructed hitherto and provided with mechanical emptying means the removal of the superphosphate has generally been efiected in such a manner that the separated portions of the superphosphate, before falling out of the chamber, is'dragged for a greater or shorter period,'al0ng the upper surface of the solid material or' along the walls of the chamber. The immediate effect thereof is that, part of the sulfuric acid contained in the separated portions of the mass is pressed out, the latter consequently becomes damp, and forms into lumps and emerges from the chamber in this condition; thereby necessitating later on the use of separate grinding or pulverizing machines. 7

It has been proposed to remove the superphosphate by hand operated cutting appliances starting from beneath the usual rectangular phosphate chambers being employed and only a relatively small strip of the bottom being exposed. It has also been proposed to employ cylindrical superphosphate chambers provided with mechanical means for operating on the mass, but in this case the axis of the cylindrical chamber was however arranged horizontally and the tools operated upon one of theend surfaces. The particles ,were consequently exposed to the beforementioned disadvantages and to avoid the latter a construction has been elfected in which the block is pushed out of the cylindrical chamber in order to present a free end. 1

This necessitates employing powerful machinery and great force and is therefore costly, besides being diflicult of execution, while at the same time the mass is subjected to the injurious pressing action which it is desirable to avoid. It is moreover known to employ which aftera front surface has been removed, a rotating and forward moving knife-carrying head presses. A. slot is provided at the bottom of the cylinder to perphosphate chamber horizontal drums against the conmit of the discharge of thepowdered mass. This construction doesv not however achieve the results which are the obj ect' of the present invention.

The object of the present invention is to remedy the above defects by preventing the particles after being scraped off from coming into contact with the surface of the block or withthe walls of the chamber, thus insuring that a powder is produced, which requires no subsequent treatment, and from which no sulfuric acid has been abstracted.

A further object of the invention is to effeet the drying of the particles as they fall down and this can moreover be assisted by mechanical means, such like.

The present invention consists in a superprovided with mechanical emptying means'in which the entire bottom plate upon which the solid mass rests can be withdrawn, the walls of the chamber being constructed slightly tapering in the downward direction in order to support the mass when the bottom plate is removed, the knives being adapted to act from beneath on the superphosphate thereby permitting the particles to freely fall clear of all obstructions.

In carrying the invention into effect the following points must be borne in mind.

, 1. The chamber must be arranged so that when the bottom is removed the entire area thereof is exposed. The walls of the chamber must therefore be relied upon to support the solidified mass. If this cannot be efas an air blast or the fected by a cylindricalchamber then in that case the chamber must be constructed with a slight downward taper.

2. The knives must act upon the block of material from beneath and must be adapted to permit each particle immediately it is separated from the block, to fall freely downward between the knives. The knives may be'removed relatively to the chamber or vice versa although from a practical point of view the former is preferable, since less power is required. If the area of the chamber increases as the workproceeds upward, care must be taken by a suitable construction of the knives, that the entire surface is still uniformly operated upon.

Reference will now bemade to theaccompanying drawings in which Figures 1 and 2 represent vertical sections, taken at right angles to each other, of the chamber. Figs. 3 and 4 are horizontal sections on the line and AB respectively of Figs. 1 and 2. Fig. 5 is a sectional view on theline EF of .Fig. 4, Figs. 69 .are detailed views on a somewhat larger scale illustrating the arrangement of the scraping knives. a Similar letters of reference refer tolike parts.

The chamber preferably consists of a con-.

crete shaft 1) tapering slightly toward the button; the.latterbeingformed by a base plate d adapted to be moved in or outin a lateral direction in guide grooves traversing the wall of the chamber and on L-shaped guide bars -w attached'in a suitable manner to the outer wall ofthefichamber b. The movement of the plate (1 may be effected by means of a pinion d engaging a rack d at the bottom side of the plate d. The pinion is fixed on a shaft d journaled in flanges of the guide bars'w and adapted to be operated by a chain wheel dand chain 03 The plate 03 when in its inner or closing position is carried by supporting levers is which may be actuated or swung outward each by means I of a bolt is upon the threaded outer end of which is provided a chain wheel 2' operated preferably by means of a chain not-shown.

Thls arrangement enables the plate d to be lowered somewhat from the superphosphate resting thereon, after the latter has stiffened, so that the plate 03 is thereby separated and relieved from-the material and can be more easily withdrawn out of'the chamber into its outer position on the guide bars w. The cone shaped block of superphosphate will now be supported solely by the inner cone shaped 'walls of the shaft, which is at its upper end provided with a filling device a, an observation aperture 1*, and a pipe 71. for exhausting injurious vapors arising from the mass when solidifying.

The part of the chamber "situated beneath" the-sliding plate d,is cylindrical and provided at the sides with suitable openings. In the interior of this chamber is j ournaled a spindle 0 symmetrical with the vertical center axis, the lower part of the spindle being provided with a screw thread. A bearlng m forms or contains a rigid or stationary nut for the said screw part-of the spindle which is provided with a longitudinal oove 6" adapted to engage with a rib provided in the otherwise plain inner wall of the hub l of the bevel wheel Z resting loosely upon the nut m, so that when thewheel Z is rotated it turns also the spindle c which thereby screws itself up or down in the nut m according to the direction of the rotation of the wheel Z. Rotation may be imparted to the wheel Z by the bevel wheel Z, the shaft n and the belt pulleys 12 or o. By the simultaneous rotational and axial movement to be imparted to the spindle 0 the latter may be raised or lowered at will. Below the nut m and sunk in the foundation is provided a casingor sleeve 9 into which passes down the screw threaded end of the spindle being thus protected. lit the upper end of the spindle is provided t e arefastened the scraping knives operating on the material. The knives are constructed each of two parts 6 and t slidably connected with each other-in radial direction for example by arranging the part with a. slot u on guide pins 12 of the part at. The outer part- 1) being normally pressed outward by a spring bolt a} suitably held and attached to the knife part t and acting against a shoulder 3/ of the knife part t outer end of the latter always rests with its rollers against the wall of \the chamber,

of the mass block being acted upon, although this surface may vary in size by reason of the conical construction of said chamber.

The mode of operation is as follows The reaction mixture is poured into the chamber 6 through the device a, the mass is then allowed to cool and solidify, whereupon the slide plate d is slightly lowered by tilting its supporting levers is, being thereby separated and relieved from the weight of the solidified mass. The slide plate is then withdrawn, the entire bottom surface of the mass block being .now free and adapted to be operated upon by the knives t t, which are rotated and gradually raised .by means of the spindle c. The ma-v terial scraped oil by the rotating knives and eing in the form of a powder falls into the chute f and is thence led or taken away by any suitable means. vapors formed during the scraping ofl of the material can be withdrawn by suction through the pipe h away.

u I claim 1. In a superphosphate chamber, a removable bottom to support an unsolidified charge in quently remove the bottom, the interior wall of said chamber tapering toward said bottom, whereby when said mass-solidifies the latter is sustained by said wall.

2. In a superphosphate chamber, a removable bottom therein to support an unsolidified charge in the chamber, said chamber comprising means independent of the bottom'to support the mass' when the latter solidifies.

3. In a superphosphate chamber, a removable bottom to support an unsolidified charge in the chamber, said chamber comprising means independent of the bottom to support the mass when the latter solidi- Any noxious acid star shaped or spider member e,to which whereby the and safely carried I the chamber, means to subse- 3 normal position to fies and means to lower the bottom from its normal poS'tion to free it from the charge when the latter, solidifies.

4; In a superphosphate chamber, a removable bottom to support an unsolidified charge in the chamber, said chamber comprising means independent of the bottom to support the mass when the latter solidifies, means to lower the bottom from its normal position to free it from the charge when the latter solidifies and means to remove the bottom after lowering the latter.

5. In a' superphosphate chamber, a removable bottom to support an unsolidified charge in the chamber, said chamber comprising. means independent of the bottom tosupport the mass when the, latter solidifies, means to lower the bottom from its normal position to free when the latter solidifies, the bottom after lowering the latter, and means beneath said bottom ada ted to cut the solidified material when the Bottom is removed. 1

6. In a superphosphate chamber, movable bottom to support an unsolidified charge in the chamber, said chamber comprising means independent of the bottom to support the mass when the latter solidifies, means to lower normal position to freeit from the charge when the latter solidifies,,means to remove the bottom after lowering the latter, revolving cutters mounted beneath the bottom adapted to engage the end surface of the mass when the bottom is removed, and means toraise and lower said cutters.

7. In a superphosphate chamber, a removable bottom to support an unsolidified charge in the chamber, said chamber comprising means independent of the bottom to support the mass when the latter solidifies, means to lower the bottom fromits free it from the charge when the latter solidifies, means to remove thezbottom after lowering the latter, revolvadapted to engage the end surface of the mass when the bottom i's removed and means the cutters during their to gradually raise revolution.

8. A superphosphate chamber, vcompris it from the charge means to remove,

a rethe bottom from its cutters mounted beneath the bottom ing a shaft having downwardly converging interior walls, a removable bottom in said means to actuate said members to lower ter from the supporting members.

9. A superphosphate chamber comprising a shaft having interior walls, a removable bottom'in said shaft, levers to support the bottom in the shaft, means to swing the levers to lower the bottom, and means to withdraw the bottom laterally from the shaft.

, 10. A superphosphate chamber, comprising a shaft having downwardly converging interior walls, a bottom in the shaft to suport iileans to lower the bottom from its normal position to free it from the charge when the latter solidifies, means towithdraw the lowered bottom, a" rotatable vertically zontally mounted cutters on theshaft.

11. A superphosphate chamber comprising a shaft having downwardly converging interior walls, a bottom inthe shaft to support, an unsolidified charge in the latter, means. to lower the bottom from its normal pbsition to free it from the charge when the latter solidifies, means to withdraw the lowered bottom, a rotatable vertically mounted screw-shaft beneath the bottom, horizontally mounted cutters on the shaft and means to rotate and raise the shaft simultaneously.

12. A superphosphate chamber comprising a shaft having downwardly converging interior walls, a bottom in the shaft to support an unsolidified charge in the latter, "means to lower the bottom from its normal position to free it the latter solidifies, means to with aw the lowered bottom, a rotatable, vertically mounted screw-shaft beneath the, bottom, horizontally mounted cutters on the shaft and means to radially extend the cutters au 'tomatically.

101mm FRIEDRICH CARL MARTIN Tamas.

ERNEST H; L. MUMMENHOFF.

shaft, supporting members for said bottom,v

the bottom and-means to withdraw the lat-* downwardly converglng.

an unsolidified charge in the latter,

from the char e when mounted shaft beneath the bottom and hori- 

